When comparing Moom vs Notational Velocity, the Slant community recommends Notational Velocity for most people. In the question“What are the best power user tools for macOS?”Notational Velocity is ranked 18th while Moom is ranked 28th. The most important reason people chose Notational Velocity is:

Pros

Pro

Simple and GUI-based

While you can set keyboard shortcuts, Moom has a very easy-to-use GUI to get it going right away.

Pro

Multi-monitor support

Pro

Save window position and size

Users can set window position and size themselves, allowing for a great way to set up a tiling window experience.

Pro

Quick powerful keyboard shortcuts

Moom comes with many preset keyboard shortcuts. The user can go into the graphical settings of the app and change any one of them to a different combination of keys.

Pro

Snaps to edges

In addition to using the grid or the overlay, Moom can move and zoom windows by dragging them to screen edges.

Pro

Zoom button for all apps

Moom adds an overlay zoom button to the corner of all apps which allows any app to go full screen or be placed to certain sections of the screen (such as the top, bottom, or sides). This works even on apps that do not normally allow for full screen views.

Pro

Simple and minimalistic

The interface is clean and unobtrusive.

Pro

Syncs with SimpleNotes or Dropbox

Pro

Free

Cons

Con

UI for settings can be confusing

The settings for the app are pretty jumbled and are hard to get a grip of, especially for first time users. While all the settings one would need are there, they are difficult to find or understand, which requires a good bit of playing around with the settings in order to get a feel for them and what they offer.

Con

Costs

Moom is not free: it costs $9.99.

Con

Two steps needed, while some tools only need one

Con

Feels a bit outdated

The last release was from 2011. Although due to its brilliant simplicity in doing what it's designed for, some might think there hasn't been any need for an update, as long as it still works with the newer OSs.